Christo plans to stretch fabric over the Arkansas River for two weeks
in August 2014, an effort that critics who've dubbed themselves "ROAR," or Rags Over The Arkansas River, maintain is as risky as mineral development.

The suit against the Bureau of Land Management maintains Christo's
project "requires the use of equipment commonly used in mining and road
building, such as hydraulic drill masts mounted on Cat 320-330
long-reach excavators, Cat M313D—M322D wheeled excavators, boom truck
cranes, grouters, air compressors, water tanks, grout mixers, support
trailers, steel rock anchors, and anchor frames."